Thanks for the response. The parts I am specifically interested in are the descriptions of "Stream of Spirit" and "Extension of Power" in the section of Aikido called "Basic Knowledge." Are they significantly adding to, or dismissing from, or altering his father's teaching or philosophy?

If so, is the implication that Osensei cared so little about this book and its contents that he would allow something he felt was in opposition to his teaching to be published?

Best,

Corky

It's not just descriptions, but how they're interpreted, and the context - especially the context in the original language, which is often (usually) different from the translations. That's really too much to get into here, in any case (I've touched on some of this in my blog, I'd just say to be cautious about how literally you take a translation of Kisshomaru as an absolute statement on Morihei's beliefs.